Psychological Research Descriptive and Inferential Research Paper

Pages: 4 (1173 words)  ·  Bibliography Sources: 3  ·  File: .docx  ·  Level: Master's  ·  Topic: Education - Mathematics


A variable is then tested on the test group, while the control group remains unaffected. The results from the test group are then compared to the control group, which has not been involved in the actual testing, and the results are observed.

Download full Download Microsoft Word File
paper NOW!
By using a "true experiment" design, the results are difficult to refute, but there are things that can invalidate a study. These are known as threats to internal validity, or "confounds that serve as plausible alternative explanations for a research finding." ("Threats to Internal Validity") There are a number of different threats which can serve as alternative explanations including what is referred to as a patient's history, maturation, the effects of testing on a subject, the instrumentation used, chance, attrition, and even the selection of subjects for the test and control groups. Some of these threats can be minimized because a true experiment must be set up in a way that will do so. For instance, making certain to randomize the individuals in the both the test and the control groups, isolating the subjects from each other to prevent interaction, keeping the testing short to minimize the chance of boredom influencing the subject's reactions, or only testing one simple variable. But despite these efforts, not all internal validity threats can be eliminated. There will always be the chance of contamination of the subjects, or interaction, rivalry, or competition between subjects. Subjects may lose interest in the study, become bored, or even resentful toward the researchers. There are also what is called expectancy errors, which are errors made by the experimenters in interpreting or analyzing data. And sometimes the subject may simply alter their view of things during the study, which may effect their responses.

4. Quasi-experiments

TOPIC: Research Paper on Psychological Research Descriptive and Inferential Assignment

Quasi-experiments are an important alternative when true experiments are not possible. These types of experiments are similar to true experiments but lack the degree of control found in true experiments. Quasi-experiments usually lack a sense of randomness and are usually conducted in external environments, such as a work environment. There are usually at least two variables in quasi-experiments, the "quasi-independent variable," or the variable that is being tested, and the "grouping variable," which is similar to a control group but with a variable that has a predictable result. This predictable result will serve as the base to compare the results of the quasi-independent variable against.

These types of experiments are important when a true experiment is not possible, or when certain variables of the experiment cannot be controlled. It is also important when experimenting necessitates that the experiment be conducted outside a controlled laboratory environment. And since quasi-experiments are natural experiments, their conclusions may be applied to other subjects and settings, and used to make generalizations about an entire population. While the results of true experiments may be limited to the population studied, quasi-experimental results can be expanded to cover more than just those involved in the study. This is their real value, being used to draw larger conclusions about larger populations. When a researcher has a limited population to study, then a quasi-experiment can serve as a means to gain information about the population in general.


"Definition of Descriptive and Inferential Statistics." Dear Habermas. Retrieved from

Healey, Joseph. (1999). Statistics, Fifth Edition. Wadsworth Publishing.

"Threats to Internal Validity." Psychometrics. Retrieved from

"True Experimental Design - Experiments with Control Group Randomized." The Scientific Method, Science, Research, and Experiments. Retrieved from [END OF PREVIEW] . . . READ MORE

Two Ordering Options:

Which Option Should I Choose?
1.  Download full paper (4 pages)Download Microsoft Word File

Download the perfectly formatted MS Word file!

- or -

2.  Write a NEW paper for me!✍🏻

We'll follow your exact instructions!
Chat with the writer 24/7.

Psychological Research "It Is Difficult to Turn Thesis

Happiness Research Paper

Inclusion Research Daniel, L.G. and King Term Paper

Psychological Theories as Applied to Gerontology Research Paper

Examine the Field of Organizational Psychology Research Paper

View 200+ other related papers  >>

How to Cite "Psychological Research Descriptive and Inferential" Research Paper in a Bibliography:

APA Style

Psychological Research Descriptive and Inferential.  (2011, July 31).  Retrieved August 4, 2021, from

MLA Format

"Psychological Research Descriptive and Inferential."  31 July 2011.  Web.  4 August 2021. <>.

Chicago Style

"Psychological Research Descriptive and Inferential."  July 31, 2011.  Accessed August 4, 2021.